Order 66

Order 66 was a secret order that all clone troopers were given during their training. When instructed to execute the order by the Supreme Commander, the clone army would immediately eradicate all members of the Jedi Order.

Order 66 was implemented by Palpatine at the end of the Clone Wars, resulting in the almost complete destruction of the Jedi Order. It was a key component of the establishment of the Galactic Empire.